Here is the ruler element that would change the Webflow world! Ruler Link
Many exclamation points. Wow. So good.
Haha. Yeah man.
Guides can be snapped to DOM elements (experimental, use with caution, can be slow or unresponsive on pages with lots of elements)
We'll have to implement something that works better though. It will happen, my friend. Just not sure when. There are lots of really cool things coming soon.